2000 Chevy Silverado HARD TO START COLD AND HOT

Tiny
RENFRU
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 159,000 MILES
STARTS COLD WHEN JUICED WITH STARTING FLUID. WARMS UP A BIT AND THEN RUNS OK. RUNS GREAT EVEN HAULING A BED FULL OF STUFF. THEN IF PARKED FOR A SHORT WHILE IT WONT START AGAIN UNTIL COOLED DOWN OR JUICED UP AGAIN. IF IT IS RUN HARD UP HILL, IT LOSES POWER AND DIES AND NEEDS TO BE COOLED DOWN AGAIN (AT THIS POINT JUICING WONT HELP). I CARRIED A PRESSURIZED WATER CAN WITH ME AND WHEN IT DID IT AGAIN I SPRAYED ONLY THE THE TOP OF THE INTAKE MANIFOLD BETWEEN THE MANIFOLD AND PLENUM AND AFTER THAT IT STARTED UP AND RAN FINE AND I GOT IT HOME. I HAD THE FUEL PUMP PRESSURE CHECKED AND IT WAS ONLY 22 PSI WHEN COLD. AM I HAVING VAPOR LOCK AT THE RACK WHEN HOT DUE TO THE LOW PUMP PRESSURE OR IS THERE A SENSOR TELLING THE TRUCK TO RUN TOO LEAN? COULD IT BE THE FUEL PRESSURE REGULATOR? WHY DOES IT SEEMED TO BE OK UNTIL IT GETS HOT? THE WATER TEMP IS OK. I DID GET A CHECK ENGINE LIGHT AND THE OBDII READER SAYS LEFT AND RIGHT BANK TOO LEAN. I KNOW IT SOUNDS LIKE A FUEL PUMP BUT WHY ONLY WHEN ITS AT START UP OR WHEN RUN TO HIGH UNDER THE HOOD TEMPERATURE. THE LAST PERSON TO OWN IT TOLD ME HE HAD REPLACED THE FUEL PUMP AT ONE TIME IN THE PAST BECAUSE IT WAS NOISEY, NOT DUE TO THIS PROBLEM.
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Tuesday, October 12th, 2010 AT 5:02 PM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
Have you checked the temp sensor?
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Wednesday, October 13th, 2010 AT 10:46 AM

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